PROMAtect ® 50 Bushfire roof · 2016-12-02 · PROMATECT 50 BUSHFIRE RESISTANT ROOF P50 98.30 3 1...
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Transcript of PROMAtect ® 50 Bushfire roof · 2016-12-02 · PROMATECT 50 BUSHFIRE RESISTANT ROOF P50 98.30 3 1...
PROMATECT® 50BUSHFIRE RESISTANT ROOF
P50 98.30
2
The roof of a structure is often forgotten when designing for fi re protection from an external source. Up until recently this was the case in Australia for houses built in locations that may be subject to extreme bushfi re conditions.
It seems incredible that so much e� ort and cost is put in to designing and building the external walls of houses in such zones and yet a roof is ignored.
Typically the fl ame front of a bush fi re will pass in a matter of 2 or 3 minutes but the ferocity and temperatures of these fronts can reach in excess of 1200°C.
It is quite common in Australia for house owners to retreat inside their homes until the front passes and then emerge to put out any fi res that are burning whether they be in the surrounding bush or the house itself. What has been ignored up until now is the e� ect that these extreme temperatures will have on the combustible roof and wall framing in the aftermath of the fi re front.
Tests have shown that even after the fi re front has passed, combustibles like timber framing contain residual heat and indeed the heat can continue to grow.
The result can be that even after some considerable time, ignition can occur within roof spaces and wall cavities and the innocent house owner may well have moved on from their own property to assist neighbours only to return and fi nd their home burnt down or severely damaged. An even worse scenario is that the house owners stay inside their homes (and may even go to bed) thinking that they are safe, only to fi nd themselves trapped within a burning inferno.
The development of a compliant roof systems, which was jointly funded by Forest and Wood Products Australia Limited, BlueScope Steel Limited and Promat Australia Pty Ltd, is a cooperative approach to overcome the challenges associated with the design of construction systems that meet the requirements of the most extreme bushfi re attack level under the new standard. Promat solution for the main roof using PROMATECT® 50 Cement Bound Matrix board has been successfully tested at a NATA approved facility, Exova (Warrington Fire Research), and is now available.
Bushfi re alert — Promat’s recommended protection of roofs in bushfi re prone areas
Victorians planning to rebuild on sites assessed as BAL-FZ under the new Australian Standard now have the choice of a roofi ng system tested to meet the standard.
Acting Building Commissioner, Sarah McCann-Bartlett, welcomed the results of the testing and encouraged building designers and builders to familiarise themselves with the roofi ng systems to assist and advise bushfi res a� ected communities to rebuild their homes.
“We are pleased to have new roofi ng systems that meet the rigorous testing under the new Standard. It will give people the confi dence of knowing that the new roofi ng system they choose is suitable for those areas that have been assessed as BAL-FZ,” said Ms McCann- Bartlett.
The development of the roof systems, which was jointly funded by Forest and Wood Products Australia Limited, BlueScope Steel Limited and Promat Australia Pty Ltd. It involved a cooperative approach to overcome the challenges associated with the design of construction systems that meet the requirements of the most extreme bushfi re attack level under the new standard.
“This independent research and testing is a great example of industry partners working together for the greater benefi t of the Victorian community. I understand that a similar collaboration will see additional roofi ng systems become available in coming weeks,” she said.
The Victorian Government introduced the new residential bushfi re construction building standard, AS 3959: 2009, in March 2009 responding to the overwhelming need to better protect the bushfi re a� ected communities.
“This is a great milestone for all those families and homeowners wishing to rebuild after the devastating bushfi res and paves the way for these people to have a choice of building systems that contribute to their safety in the future while suiting their personal needs,” said Ms McCann-Bartlett.
For further information visit www.buildingcommission.com.au
Media ReleaseFrom the Acting Building CommissionerNew roof systems for bushfi re a� ected homes Tuesday, 21 July 2009
PROMATECT® 50BUSHFIRE RESISTANT ROOF
P50 98.30
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1 One layer of 9mm thick PROMATECT® 50 board
2 One layer of 16mm thick fi re resistant plasterboard
3 Promat approved sealant
4 35mm x 35mm x 0.7mm thick galvanised steel perimeter angle
5 6g x 35mm coated fi xings similar to those used with treated pine, e.g Zenith Tufcoat or Builded Climacote
6 19mm timber or metal fascia
7 Timber (or steel) roofi ng construction
8 Timber (or steel) batten
9 Rockwool for insulation
0 55mm thick TP anticon insulation blanket
11 100mm x 50mm polyethylene damp coarse under the timber (or steel) batten
12 0.42mm thick corrugated roof sheeting (in accordance with the requirements of AS 1445) fi xed with nails as appropriate for installers
13 40mm x 40mm x 40mm x 0.55mm thick galvanised steel zed fl ashing profi le
14 35mm x 35mm x 0.55mm thick galvanised steel fl ashing profi le
Fire attack from belowNon loadbearing roofi ng
Overview of the roofi ng profi le
Fir
e r
esi
sta
nce
Co
nst
ruct
ion
FRL BAL-FZ
StandardAS 1530: Part 4: 2014AS 1530: Part 8.2: 2007AS 3959: 2009 (relative sections)
ApprovalA-09-615EWA 23848
Roof trusses Up to 1200mm centres
Board mass9kg/m² (based on nominal weight
of the board)
5
4
2
1
3
6
9
8
0
7
12
11
13
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6 Distinction Road
Wangara, WA 6065
T (08) 9445 8300
F (08) 9445 8400
progressivematerials.com.au
